Clip for flexible tubes



`uly l, 1947.

E. LONGDEN 2,423,195

CLIP Foa FLEXIBLE TUBES Filed Nov. 25, A194s EWE'CLMJer-b Patented July 1, 1947 Eric Longden; Greensidze, Johannesburg', Transvaal, Union off South Africa Application-November 25, 1943, Serial No. 511,661l In the Union of South Afric'aFebruary 5, 194'3 claims. (o1. 2441.9)-

This invention relates to a clip for making a joint betweenv the end of a Flexible tube-and a rigid tubular part over which its end is passed.

The object of the invention is'l to1 provide a clip with which a good joint between the Iiexible tub-e and the' rigid tubular part it embraces may be made. A further object is to provide aV narrow metallic circular surface over which the clip may move to' make the' joint without dragging and wrinkling the flexible surface and also to make the joint more easily by exerting the pressure of the clip on a narrow circular portion of the iiexible surface.

A preferred form of the invention is shown in the accompanying drawing in which Fig. l is a perspective view of a clip embodying the invention Fig. 2 is a side elevation of the same but showing an attachment.

Fig. 3 is an enlarged sectional view illustrating a portion oi a rigid tubular member with the flexible tube clamped thereto by the clip shown in Fig. 1.

According to this invention the flexible tube Ill, Fig. 3, which may be of rubber, canvas or similar material, is provided at its end, where the joint is to be made, with a springy bracelet Il, for instance, a single coil of wire overlapping at I2, I3 to terminate in ends Iii, I'I. Over this bracelet II any of the usual forms of sheet metal encircling clip I4 may be used and wrapped tightly aro-und the tube It) to make the joint by tightening bolt I5 joining the outstanding lugs 28, 29 on the ends of the clip I4. The lug 28 is formed at one end of the metal band, and at a point some distance from its opposite end the band is bent upon itself to form the double-walled lug 29 and continued on to form a bridging portion Il spanning the gap between the lugs 28 and 29.

Without the metal bracelet II the clip I4 drags over vthe periphery of the flexible tube III which tends to ruck up. This makes the pressure uneven, the joint is imperfect, and cannot be made tight without excessive strain on the encircling clip I4. By use of the bracelet II the clip I4 has a metal surface to slide upon during the tightening-up operation while at the same time the bracelet II presses into the surface of the flexible tube II) which in turn is forced into close contact With the rigid part I8 over which the tube I0 is placed. Thus the joint is made eiiiciently between the tubes IIJ and I8 and without undue tension of the clip I4 or its bolt I5, while the surface of the tube I Il remains unwrinkled.

In a convenient construction the clip I4, in the shape of a metal band having lugs 28, 29, at its ends adapted toaccorn-rnodate a nut and bolt I5 for drawing them together, has pressings I9, 2i) its wall. Said pressings are perforated at 2|, 227, so that the ends I6, I'II ofthe wire bracelet II can easily penetrate and extend beyond the Wall of the clip I4f from the inside to the outside and in opposite directions. This construction provides that they wire formi-ng the bracelet I I has its ends I6, I7 crossed in the clip at I2, I 3. The tighter the clip I4 is drawn around tube IG the further the ends IS, I'I of bracelet Il extend.

In use the clip I4, carrying on its inside surface the bracelet I I, is opened up to embrace the flexible tube IIJ and, when the parts are in proper position to form the joint, the clip I4 is tightened in the ordinary manner, the ends of the wire I6, I1 project further through the pressings I9, ZIJ and holes 2|, 22 as the clip I4 is tightened.

The ends I6, I'I of the Wire I I may, as an initial procedure, be pulled to wrap it tightly on the tube I0 when the parts are in place to make the joint and so avoid any possibility of buckling the wire II. For this purpose a chain 23 or the like may be connected to the ends I6, I'I to complete the circle of the clip I4. The chain 23 is then tightened in any suitable manner to draw the bracelet tightly onto the tube I ll. As shown in Fig. 2 there is provided a lever 24 to which the chain 23 is attached some distance from the end 25 of the lever 24. The end 25 has a hole or slot 26 to engage I6 of the wire bracelet I I. With the two ends I5, I'I of the Wire II attached to the lever 24 on the latters rotation as indicated by the dotted lines the bracelet II is drawn tightly onto the tube Ill and the nut on the bolt I5 can be easily tightened to draw towards one another the lugs 28, 29 of the clip I4 to effect the required joint.

As shown the wire Il is retained in position in the clip I4 by small pressingsZ'I on either side of the wire II at appropriate points. If desired the wire I I can be welded or otherwise secured to the inside wall of the clip I4 at a point opposite its lugs.

As shown in Fig. 3 the inside surface of clip I4 bears on the metallic surface of the wire I I instead of on the surface of the flexible tube I0 while the wire II bites into the surface of the flexible tube Il! and forces it into closer contact with the part I8 thus making a close joint between IU and I8.

The invention provides a clip for flexible tubes which will effect a joint by an even and concentrated circular and narrow zone of pressure between the iiexible tube and the part it embraces.

What I claim as new and desire to secure by Letters Patent is:

1. A hose-clamping device comprising in combination a spring band of such length as nearly to encircle the hose and having means for drawing the ends of the band toward each other, a Wire bracelet disposed Within said band in position to encircle the hose to be clamped, the ends of said bracelet overlapping each other Within the band, portions of said band adjacent its opposite ends being pressed outward to form slots and an arched member extending over each slot and tapering from a point at one end of the slot to an opening at the opposite end, the opposite ends of said bracelet passing through said slots and emerging through the openings at the ends of said tapered members whereby as the ends of the band are drawn together the bracelet is compressed Within the band and its ends spread apart in reverse proportion to the distance between the ends of said band.

2. A hose-clamping device as set forth in claim l, the ends of said bracelet being bent to form l hoo-ks outside of said band, a chain removably attached at one end to one of said hooks and passing around said band, and means removably engageable with the other hook and with the opposite end of said chain to urge the same toward said last hook thereby to contract both the band and bracelet.

3. A hose-clamping device as set forth in claim 1, the ends of said bracelet being bent to form hooks outside of said band, a chain removably attached at one end to one of said hooks and passing around said band, and a lever removably engageable with the other hook and With the opposite end of said chain to urge the same toward said last hook thereby to contract both the band and bracelet.

4. A hose-clamping device as set forth in claim 1, the ends of said bracelet being bent over in the form of hooks thereby to engage the ends of the pressed out portions and limit retractile movement of the bracelet ends.

5. A hose-clamping device as set forth in claim 1, said band having means on its inner surface for retaining the bracelet against lateral displacement.

ERIC LONGDEN.

REFERENCES CITED The following references are of record in the lilo of this patent:

UNITED STATES PATENTS Number Name Date 473,537 Weidaw Apr. 26, 1892 1,514,411 Wilkinson Nov. 4, 1924 1,748,602 Hart Feb. 25, 1930 

